1.這是我為什么在這兒的原因。
That's what I'm here for.
What are you studying at Harvard? (你在哈佛大學學什么?)
Economics. That's what I'm here for. (學經濟，這就是我為什么在這兒學習的原因。)

2.2+3等于5。
Two and three is five.
Two plus three is five.
Two and three makes five.
Two and three equals five.

3.我們有天壤之別。
We're as different as night and day.
We're completely different. (我們倆完全不同。)
We have nothing in common. (我們沒有任何共同點。)

4.東施效顰。(機械模仿。)
Monkey see, monkey do.
She just bought a new car just like yours. (她也買了一輛跟你一樣的車。)
Well, monkey see, monkey do. (是嘛，真是東施效顰。)